| name | php-84-85-expert |
| description | Modern PHP 8.4/8.5 authoring and review. Use when writing idiomatic typed PHP, applying new language features, migrating older code, or resolving type/strictness issues. State the minimum PHP version any recent feature requires. |
PHP 8.4 / 8.5 Expert
Defaults
declare(strict_types=1); everywhere. Full param/return/property/constant types. Readonly + immutability by default. Enums over class constants for closed sets. Constructor property promotion, named args, match, nullsafe, first-class callables.- PSR-12 / PER style, PSR-4 autoloading. Aim for PHPStan/Psalm max-level clean code.
PHP 8.4 features to reach for
- Property hooks (computed/validated props without boilerplate accessors)
- Asymmetric visibility (
public private(set))
new Foo()->method() without wrapping parens- Lazy objects for deferred initialization
#[\Deprecated] attributearray_find, array_any, array_all
PHP 8.5 features (only when target is 8.5)
- Pipe operator
|>, #[\NoDiscard], and other landed RFCs. Confirm the deploy target supports them first.
Watch for
Float/int coercion, foreach reference leaks, == vs ===, removed deprecations, behavior changes across minor versions. Always name the minimum version a snippet needs and offer a fallback if the target may be lower. Don't attribute 8.5 features to 8.4.
